7521413 has 4 divisors (see below), whose sum is σ = 7530348. Its totient is φ = 7512480.

The previous prime is 7521407. The next prime is 7521421. The reversal of 7521413 is 3141257.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2427364 + 5094049 = 1558^2 + 2257^2 .

It is a cyclic number.

It is not a de Polignac number, because 7521413 - 2¹⁰ = 7520389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7521433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3056 + ... + 4937.

It is an arithmetic number, because the mean of its divisors is an integer number (1882587).

Almost surely, 2^7521413 is an apocalyptic number.

It is an amenable number.

7521413 is a deficient number, since it is larger than the sum of its proper divisors (8935).

7521413 is an equidigital number, since it uses as much as digits as its factorization.

7521413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8934.

The product of its digits is 840, while the sum is 23.

The square root of 7521413 is about 2742.5194621005. The cubic root of 7521413 is about 195.9294918538.

The spelling of 7521413 in words is "seven million, five hundred twenty-one thousand, four hundred thirteen".